 @Test
    public void songListMapperTest(){
        QueryWrapper<SongList> queryWrapper = new QueryWrapper<>();
        queryWrapper.like("title","The");
        List<SongList> songLists = songListMapper.selectList(queryWrapper);
        for (SongList s : songLists) {
            System.out.println(s.toString());
        }
        Assert.assertThat(songLists, Matchers.notNullValue());//assertThat断言后面介绍
    }
